Why does behavioral bonds creates a strong connection between humans and animals?

Say for a Pit-bull dog, people see them as scary and aggressive animals, but they aren’t like that because it’s the way their owners treat them and the way they train them. If the owner abused the dog then most likely the dog will suffer from that and will be aggressive towards other humans. Now if you train the dog well and treat them right then maybe it won’t be so aggressive.

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